Thanks for your question on Healthcare Magic.
I can understand your concern.
You are having 
pulmonary embolism (PE)
 (
blood clots in lung).
In your case birth control pills and air travel are the likely cause for PE. 
Treatment of PE depends on size, site and number of clots and severity of pulmonary 
hypertension (PH). 
Since you are having multiple clots, blood thinners are the only option. 
Also get done 2d echo to know the severity of PH. 
Newer bloody thinners are available and should be started in your case. 
Warfarin, 
fenofibrate are commonly used now a days. You can should avoid broccoli and green leafy vegetables when you are on blood thinners. Salt restriction is must. 
Treatment duration is minimum 9-12 months. Further treatment depends on follow up CT scan. 
So stay in touch with your pulmonologist for good prognosis. 
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.